Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337671729
Author: SERWAY
Publisher: Cengage
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Question
Chapter 27.2, Problem 27.4QQ
(i)
To determine
The current in the battery, when a third resistor is added in series.
(ii)
To determine
The terminal voltage of the battery.
(iii)
To determine
The current in the battery, when a third resistor is added in parallel.
(iv)
To determine
The terminal voltage of the battery.
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Consider the following choices: (a) increases, (b) decreases, (c) remains the same. From these choices, choose the best answer for the following situations. (i) In 27.3, a third resistor is added in series with the first two. What happens to the current in the battery? (ii) What happens to the terminal voltage of the battery? (iii) In 27.5, a third resistor is added in parallel with the first two. What happens to the current in the battery? (iv) What happens to the terminal voltage of the battery?
24.0 V
4.00 A
R
4.00 A
Figure N
8. Consider the circuit shown in Figure b. The terminal voltage of the 24.0 V
battery is 21.2 V. What is
a) the internal resistance r of the battery; b) the resistance R of the circuit
resistor???
1.The terminals of a battery are connected across two different resistors in parallel. Which of the
following statements are correct? (There may be more thanone correct statement.) (a) The
larger resistor carries more current than the smaller resistor. (b) The larger resistor carries less
current than the smaller resistor. (c) The voltage difference across each resistor is the same. (d)
The voltage difference across the larger resistor is greater than the voltage difference across the
smaller resistor. (e) The voltage difference is greater across the resistor closer to the battery.
2. A 1.00 Ω and a 2.00 Ω resistor are parallel. What is the equivalent single resistance? (a) 1.50 Ω
(b) 3.00 Ω (c) 0.667 Ω (d) 0.333 Ω (e) 1.33 Ω
3. When connected to a 120 V source, an electric heater is rated at 1200 W and a toaster at
W. If both appliances are operating in parallel on a 120-V circuit, what total current
is delivered by an external source? (a) 12 A (b)…
Chapter 27 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 27.1 - To maximize the percentage of the power from the...Ch. 27.2 - With the switch in the circuit of Figure 27.4a...Ch. 27.2 - With the switch in the circuit of Figure 27.6a...Ch. 27.2 - Prob. 27.4QQCh. 27.4 - Consider the circuit in Figure 27.17 and assume...Ch. 27 - Two 1.50-V batterieswith their positive terminals...Ch. 27 - As in Example 27.2, consider a power supply with...Ch. 27 - Figure P27.3 shows the interior of a three-way...Ch. 27 - Prob. 4PCh. 27 - Consider the two circuits shown in Figure P27.5 in...
Ch. 27 - Consider strings of incandescent lights that are...Ch. 27 - You are working at an electronics fabrication...Ch. 27 - In your new job at an engineering company, your...Ch. 27 - A battery with = 6.00 V and no internal...Ch. 27 - A battery with emf and no internal resistance...Ch. 27 - Todays class on current and resistance is about to...Ch. 27 - Why is the following situation impossible? A...Ch. 27 - Calculate the power delivered to each resistor in...Ch. 27 - For the purpose of measuring the electric...Ch. 27 - Four resistors are connected to a battery as shown...Ch. 27 - You have a faculty position at a community college...Ch. 27 - The circuit shown in Figure P27.17 is connected...Ch. 27 - The following equations describe an electric...Ch. 27 - Taking R = 1.00 k and = 250 V in Figure P27.19,...Ch. 27 - In the circuit of Figure P27.20, the current I1 =...Ch. 27 - (a) Can the circuit shown in Figure P27.21 be...Ch. 27 - For the circuit shown in Figure P27.22, we wish to...Ch. 27 - An uncharged capacitor and a resistor are...Ch. 27 - Prob. 24PCh. 27 - In the circuit of Figure P27.25, the switch S has...Ch. 27 - In the circuit of Figure P27.25, the switch S has...Ch. 27 - A 10.0-F capacitor is charged by a 10.0-V battery...Ch. 27 - Prob. 28PCh. 27 - Prob. 29PCh. 27 - Prob. 30PCh. 27 - Prob. 31PCh. 27 - Prob. 32APCh. 27 - Find the equivalent resistance between points a...Ch. 27 - The circuit in Figure P27.34a consists of three...Ch. 27 - The circuit in Figure P27.35 has been connected...Ch. 27 - The resistance between terminals a and b in Figure...Ch. 27 - (a) Calculate the potential difference between...Ch. 27 - Why is the following situation impossible? A...Ch. 27 - When two unknown resistors are connected in series...Ch. 27 - Prob. 40APCh. 27 - The circuit in Figure P27.41 contains two...Ch. 27 - Prob. 42APCh. 27 - A power supply has an open-circuit voltage of 40.0...Ch. 27 - A battery is used to charge a capacitor through a...Ch. 27 - Prob. 45APCh. 27 - (a) Determine the equilibrium charge on the...Ch. 27 - In Figure P27.47, suppose the switch has been...Ch. 27 - Figure P27.48 shows a circuit model for the...Ch. 27 - The student engineer of a campus radio station...Ch. 27 - Prob. 50APCh. 27 - The switch in Figure P27.51a closes when Vc23Vand...
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